(19)

(11)

EP 2 274 787 A2

(12)

(88) Date of publication A3: 11.03.2010 (43) Date of publication: 19.01.2011 Bulletin 2011/03 (21) Application number: 09746764.1 (22) Date of filing: 14.05.2009

(51) International Patent Classification (IPC):  H01M 10/02(2006.01) (86) International application number: PCT/KR2009/002561 (87) International publication number: WO 2009/139585 (19.11.2009 Gazette 2009/47)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 16.05.2008 KR 20080045735 (71) Applicant: SK Energy Co., Ltd. Seoul 110-110 (KR)	(72) Inventors: RHEE, Jang-weon Daejeon 305-728 (KR) JUNG, Inhwa Cheonan-si Chungcheongnam-do 330-873 (KR) KANG, Gwigwon Daejeon 305-810 (KR) LEE, Youngkeun Seoul 137-949 (KR) (74) Representative: Albrecht, Thomas et al Kraus & Weisert Patent- und Rechtsanwälte Thomas-Wimmer-Ring 15 80539 München 80539 München (DE)